Disney isn't the only company to experience "brand worship." Is everything that Google does perfect? Probably not but there are people I know who operate on the theory that everything Google does it does best. We also love to root for successful businesses and then tear them down for being successful.
I go to DL because I feel that I get a very good value for my money spent. I have a very fond place in my hear for DL so I probably forgive missteps easier. Every time I bust out the cash for an expensive water of ice cream, I am clearly aware DL is a business. As an adult I find this business facinating.
I loved the park as a kid because it was fun and exciting and a place that my parents allowed me some freedom. I like it now because I appreciate the art and architecture; the little details that they don't have to tend to but do! When I was a kid it was all about maximizing rides (and talking my parents out of their E tickets.) Today I enjoy time with my friends and best of all with my children and nieces and nephews who are experiencing the park in a way I can't anymore.
All of that is Magic. It doesn't exist at parks like Great America or Six Flags Discovery Kingdom near me in Nor Cal.